Specifications

Squelch Tail Elimination (STE)
STE is used with tone and digital Channel Guard to
eliminate squelch tails. The STE burst is transmitted when
the microphone PTT switch is released. The receiving radio
decodes the burst and mutes the receiver audio for 250 ms.
This mute time allows the transmission to end and to mute
the squelch tail. The radio looks for STE on the received sig-
nal when the microphone is either on or off-hook.
HARDWARE AND HARDWARE
OPTIONS
The location and placement of system hardware options
is shown on the MDX Conventional Mobile Radio Intercon-
nection Diagram 188D5198.
CABLE OPTION PMCD7Z
Cable Option PMCD7Z is used to bring all option connec-
tions from the system Board through the back of the radio to
the outside. This cable is required with all external options.
NOISE SUPPRESSION KIT OPTION PMPD1A
Noise Suppression Kit, Option PMPD1A, consist of filter
19A148539G1 and Installation Manual LBI-31363. This kit is
available for installations where excessive alternator or electri-
cal noises, present on the power cable, do not permit the radio
to operate properly. Refer to the Interconnect Diagram for the
radio and options.
POWER CABLE OPTION PMCD9A
The 18-foot Power Cable Option, PMCD9A
(19B801358P17) is available for installations requiring more
than the standard 9-foot cable.
EXTERNAL SPEAKER OPTION PMZM1T
External Speaker and Cable Option PMZM1T, provides the
user a 5-inch waterproof speaker in a LEXAN housing. Option
PMCC9M is an 18-inch, external speaker cable option
PMCC9M (19A149590P8), included in the option PMCD7Z.
A 16-foot cable option PMCD1W (19A149590) is also avail-
able.
When using the external speaker, the internal speaker
should be disconnected. The internal/external speaker switch
option PMPL3D allows use of both speakers (Refer to the In-
terconnection Diagram).
EXTERNAL ALARM HORN RELAY OPTION
PMSU1C
External Alarm Horn Relay Option PMSU1C
(19A705499P1) can sound the vehicle horn when a call is re-
ceived. The option connects to Pin 13 of cable option
PMCD7Z (19C851585P14) and is enabled through the front
panel switch.
RADIO OPERATION
A complete set of operating instructions for the MDX UHF
radio are provided in Operator’s Manual LBI-39012. A copy of
LBI-39012 is provided with each radio.
In the conventional mode of operation, the user selects a
channel and communicates on that channel in the conventional
mode. A system refers to a set of channels and a channel is a
transmit/receive radio frequency pair.
The exact operation of any radio depends upon the operat-
ing mode, the programming of the radio and the particular ra-
dio system. Most features described in these operating
instructions can be enabled or disabled through programming.
Both of these important factors must be considered when ad-
dressing the following instructions.
USER INTERFACE
Operating controls are located on the radio front panel and
microphone.
The Front panel Light Emitting Diode (LED) display pro-
vides radio status and communication control information for
the operator. The keypad is used for activation of various fea-
tures and functions.
Turning The Radio On/Off
The radio is turned On/Off by pressing the PWR button in
the upper left corner of the front panel. To turn the radio OFF
press the PWR button again.
SCAN OPERATION
The SCAN function allow monitoring up to 16 receive
channels. The scanned channels may be any frequency within
the frequency band limits of the radio and may be Channel
Guard protected (tone/digital). All scan functions are retained
in memory, even if the 12 Volt battery is disconnected.
Any channel may be scanned with or without a priority
level. One channel may be programmed for Priority 1 (P1)
and another for Priority 2 (P2) with any or all remaining chan-
nels programmed as non-priorities.
RECEIVER SCAN RATE
The scan rate for the radio will vary depending upon the
number of channels programmed into the scan list and whether
or not Channel Guard is programmed. When scanning 16 inac-
tive channels, the priority channels are sampled 11 times/sec-
ond and the non-priority channels 3 times/second. The scan
rate will be faster when fewer channels are programmed into
can memory.
PRIMARY
CODE
EQUIVALENT
CODE
PRIMARY
CODE
EQUIVALENT
CODE
PRIMARY
CODE
EQUIVALENT
CODE
023
025
026
031
032
043
047
051
054
065
071
072
073
074
114
115
116
125
131
132
134
143
152
155
156
162
165
172
174
205
223
226
243
244
245
340 766
566
374 643
355
375 707
520 771
405 675
301
603 717 746
470 701
640
360 721
327 615
534 674
060 737
173
572 702
605 634 714
273
333
366 415
233 660
517 741
416 553
354
057
142 270
135 610
350 475 750
104 557
267 342
176 417
370 554
251
261
263
265
271
306
311
315
331
343
346
351
364
365
371
411
412
413
423
431
432
445
464
465
466
503
506
516
532
546
606
612
624
627
631
236 704 742
227 567
213 736
171 426
427 510 762
147 303 761
330 456 561
321 673
372 507
324 570
616 635 724
353 435
130 641
107
217 453 530
117 756
127 441 711
133 620
234 563 621 713
262 316 730
276 326
222 457 575
237 642 772
056 656
144 666
157 322
224 313 574
067 720
161 345
317 614 751
153 630
254 314 706
075 501
037 560
231 504 636 745
632
565
654
662
664
703
712
723
731
732
734
743
754
036
053
122
145
212
225
246
252
255
266
274
325
332
356
446
452
454
455
462
523
526
123 657
307 362
163 460 607
363 436 443 444
344 471 715
150 256
136 502
235 611 671
447 473 474 744
164 207
066
312 515 663
076 203
137
535
525
253
536
542 653
661
425
655
652
550 626
433 552
521
467 511 672
524 765
513 545 564
533 551
472 623 725
647 726
562 645
NOTE:
Primary codes in bold are unique Ericsson codes.
Table 2 - Digital Channel Guard Codes
LBI-39014B
4